Steady State Theory

In this post I will try to explain about Steady state theory. It is the less popular one. Although it has many flaws and discrepancies, still it is the main competitor for Big Bang.

As the name suggests, according to Steady state theory universe is constant it never changes. This theory states that even if Universe is expanding the relative density of the universe remain constant. The steady state theory asserts that although the universe is expanding, it does not change its look over time or in other words it has no beginning and no end. So, this theory requires that new matter must be continuously created so as to keep the overall density constant. Matter is mostly created in the form of hydrogen.

Flaws:

1) Steady state predicted that objects like quasars and radio galaxies are found everywhere. But observations and calculations suggest that this is not the case. In fact these objects are found only at large distances.

2) Another flaw in the theory is related to cosmic microwave background radiation. Steady state theory states that these radiations are from ancient stars. However, cosmologists found this explanation unconvincing, as the cosmic microwave background is very smooth, making it difficult to explain how it arose from point sources.